140515230721 has 16 divisors (see below), whose sum is σ = 151017733440. Its totient is φ = 130351818240.

The previous prime is 140515230659. The next prime is 140515230763. The reversal of 140515230721 is 127032515041.

It is a cyclic number.

It is not a de Polignac number, because 140515230721 - 2³¹ = 138367747073 is a prime.

It is not an unprimeable number, because it can be changed into a prime (140515230421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 216060 + ... + 572461.

It is an arithmetic number, because the mean of its divisors is an integer number (9438608340).

Almost surely, 2^140515230721 is an apocalyptic number.

It is an amenable number.

140515230721 is a deficient number, since it is larger than the sum of its proper divisors (10502502719).

140515230721 is a wasteful number, since it uses less digits than its factorization.

140515230721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788736.

The product of its (nonzero) digits is 8400, while the sum is 31.

Adding to 140515230721 its reverse (127032515041), we get a palindrome (267547745762).

The spelling of 140515230721 in words is "one hundred forty billion, five hundred fifteen million, two hundred thirty thousand, seven hundred twenty-one".